Tim Wescott wrote:
Jim Wilkins wrote:
On Jul 22, 12:05 pm, Tim Wescott wrote:
...
Most integrated circuits aren't 'shimmed' so much as selected. ...
Tim Wescott

Devices that combine analog with digital often have calibration EPROMs
to adjust the gain and offset of A/D converters, for example.

Hmm. Good point. I was thinking of laser trimming and other gross
physical changes to the chips, which has gone seriously out of vogue.
But 'calibration' lives in the same conceptual space as 'shimming', I
suppose.

thick film circuits still get adjusted by burning with lasers.